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MFB: more elaborate HUGE_VAL test

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Ard Biesheuvel 2004-04-03 10:42:42 +00:00
parent 53b4597fca
commit 5367158046
1 changed files with 10 additions and 3 deletions
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13
ext/standard/config.m4
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@ -389,7 +389,7 @@ if test "$ac_cv_atof_accept_inf" = "yes"; then
AC_DEFINE([HAVE_ATOF_ACCEPTS_INF], 1, [whether atof() accepts INF])
fi
AC_CACHE_CHECK(whether HUGE_VAL + -HUGEVAL = NAN, ac_cv_huge_val_nan,[
AC_CACHE_CHECK(whether HUGE_VAL + -HUGEVAL == NAN, ac_cv_huge_val_nan,[
AC_TRY_RUN([
#include <math.h>
#include <stdlib.h>
@ -413,9 +413,16 @@ AC_CACHE_CHECK(whether HUGE_VAL + -HUGEVAL = NAN, ac_cv_huge_val_nan,[
#define zend_isnan(a) 0
#endif
double hv(int i)
{
/* avoid inlining */
if (i) return hv(i-1);
else return HUGE_VAL;
}
int main(int argc, char** argv)
{
return zend_isinf(HUGE_VAL) && zend_isnan(HUGE_VAL + -HUGE_VAL) ? 0 : 1;
return zend_isinf(hv(3)) && zend_isnan(HUGE_VAL + -HUGE_VAL) ? 0 : 1;
}
],[
ac_cv_huge_val_nan=yes
@ -427,7 +434,7 @@ int main(int argc, char** argv)
])
dnl This is the most probable fallback so we assume yes in case of cross compile.
if test "$ac_cv_huge_val_nan" = "yes"; then
AC_DEFINE([HAVE_HUGE_VAL_NAN], 1, [whether HUGE_VAL + -HUGEVAL = NAN])
AC_DEFINE([HAVE_HUGE_VAL_NAN], 1, [whether HUGE_VAL + -HUGEVAL == NAN])
fi
PHP_CHECK_I18N_FUNCS